Unless the drums are grooved, warped, or worn funny, I'd just reuse them the way they are. No point intaking metal off them if it isn't needed. The rear will just have one hose, from the center of the body to the top of the rear axle housing. I'd replace that if it's original. The hard lines are anyone's guess at this point. If they aren't nasty/rusty looking, and fluid passes through them ok, I'd reuse them as long as the flare nuts are still in good shape. If you replace them, I'd get regular steel lines unless you're in a bad rust area, then I would probably go stainless. If you can find any NOS American made cylinders, I'd go that way. First, I would hone out the originals to see if just a kit would do the trick.